In the circuit diagram below, calculate the current in the 12Ω resistor if the cell...
PHYSICS
JAMB 1994
In the circuit diagram below, calculate the current in the 12Ω resistor if the cell has an emf of 12V and an internal resistance of 1?
- A. 0.8A
- B. 1.0A
- C. 1.6A
- D. 2.4A
Correct Answer: D. 2.4A
Explanation
\(E = I(R + r)\)
\(I = \frac{E}{R + r}\)
\(\frac{1}{R} = \frac{1}{12} + \frac{1}{6} = \frac{1}{4}\)
\(R = 4\Omega\)
\(I = \frac{12}{1 + 4} = \frac{12}{5}\)
= 2.4A
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *